Most Helpful Positive Review
Brad Jones
Ive been waiting for this device for well over a decade - a Bluetooth version of Logitechs fabled TrackMan Marble Wheel. And this is, indeed, a really nice trackball for use with new laptops that dont have USB-A ports, such as the MacBook/MacBook Pro. Im torn whether to give it four stars or five - its borderline, and if I could give 4.5, I would. I decided to round up. (And Ive gone back and forth several times while writing this review.) The trackball functionality is exactly as youd expect if you used the M570, with a few extra features - tiltable scrollwheel, the precision button to allow fine control, and the ability to switch between two devices. The AA battery has been replaced by li-poly and recharges via micro-USB. The form factor is where things get a little weird. The bottom of the trackball has a 20-degree bend in the middle, and magnets on either side. It ships with a 2mm-thick metal plate that can magnetically attach to either side to cause the tilt. The result feels much more stable than youd expect, and while you can deliberately tilt it, its not generally going to accidentally tilt when you arent expecting it. I find the tilt feels really good, actually - I hadnt expected it to. The downside of this is that it increases the weight by over 1/3, to over 9 ounces. The device is overall about 4 ounces heavier than the M570. You can use it without the metal plate, but it feels extremely wobbly in that state, and will fall to flat rather than tilted unless propped up. The only other issue is that theres no spot inside to hold the Unifying Receiver. Not an issue for me because I want this for Bluetooth, but may be an issue for someone. I purchased the MX Ergo Plus direct from Logitech - the difference is that the Plus ships with an additional plastic wedge that can add another 10 degrees of tilt. If that sounds useful to you, my understanding is that the Plus is exclusive to Logitech and Best Buy.